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Finding the Fourth Proportional to 307.79, 424.68 and 176.77

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Solution

The fourth proportional to 307.79, 424.68 and 176.77 is: 243.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    307.79 : 424.68 = 176.77 : x
  2. Step 2: Convert to fraction form
    307.79/424.68 = 176.77/x
  3. Step 3: Cross multiply
    307.79x = 424.68 × 176.77
  4. Step 4: Simplify right side
    307.79x = 75,070.68
  5. Step 5: Solve for x
    x = 75,070.68/307.79
  6. Step 6: Final answer
    x = 243.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.